Effects-laden sci-fi adventure falls flat

Longtime visual-effects specialists turned directors Colin and Greg Strause present yet another familiar alien invasion that owes huge debts to 'Independence Day,' 'Signs' and, to a lesser extent, the found-footage feel of 'Cloverfield.' But once all these elements get shoved into the juicer, all of the good pulpy elements gets ground out of it, leaving us with a decidedly flavorless strain. Grade: D-.